Do not render the page after the vue array is updated?

if you don"t want the data in the diagram, you can delete it successfully, add it or enter it, but you can"t render it. May I ask what"s going on? using this.$set (this.value [0], 2, {a 3}) doesn"t work

.
this.value = [[{a:1},{a:2},{a:3}],[]]
delete () {
   //
    this.value[0].splice(2,1)
}
// 
add () {
     this.value[0].splice(2,1, {a:3})
}

clipboard.png

Jun.22,2021

read this article carefully

https://codeshelper.com/a/11.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1ea7d0c-46bca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea7d0c-46bca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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